[server] Make connection pooler configurable and set better default values
Drop the configuration connections-pool-size and add new configurations options:
* connections-pool-min-size. Set to 0 by default so we open connections only
when needed. This avoid opening min-size*processes connections at startup,
which is, it think, a good default.
* connections-pool-max-size. Set to 0 (unlimited) by default, so we move the
bottleneck to postgresql.
* connections-idle-timeout. Set to 10 minutes. I don't have arguments about
this except that this is the default in pgbouncer.
Configuring the user interface
------------------------------
.. _relation_tags:
Relation tags
~~~~~~~~~~~~~
.. automodule:: cubicweb.rtags
.. _uicfg:
The uicfg module
~~~~~~~~~~~~~~~~
.. note::
The part of uicfg that deals with primary views is in the
:ref:`primary_view_configuration` chapter.
.. automodule:: cubicweb.web.views.uicfg
The uihelper module
~~~~~~~~~~~~~~~~~~~
.. automodule:: cubicweb.web.uihelper